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diff --git a/eigen/unsupported/test/cxx11_tensor_map.cpp b/eigen/unsupported/test/cxx11_tensor_map.cpp
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2014 Benoit Steiner <benoit.steiner.goog@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include "main.h"
+
+#include <Eigen/CXX11/Tensor>
+
+using Eigen::Tensor;
+using Eigen::RowMajor;
+
+static void test_0d()
+{
+ Tensor<int, 0> scalar1;
+ Tensor<int, 0, RowMajor> scalar2;
+
+ TensorMap<Tensor<const int, 0> > scalar3(scalar1.data());
+ TensorMap<Tensor<const int, 0, RowMajor> > scalar4(scalar2.data());
+
+ scalar1() = 7;
+ scalar2() = 13;
+
+ VERIFY_IS_EQUAL(scalar1.rank(), 0);
+ VERIFY_IS_EQUAL(scalar1.size(), 1);
+
+ VERIFY_IS_EQUAL(scalar3(), 7);
+ VERIFY_IS_EQUAL(scalar4(), 13);
+}
+
+static void test_1d()
+{
+ Tensor<int, 1> vec1(6);
+ Tensor<int, 1, RowMajor> vec2(6);
+
+ TensorMap<Tensor<const int, 1> > vec3(vec1.data(), 6);
+ TensorMap<Tensor<const int, 1, RowMajor> > vec4(vec2.data(), 6);
+
+ vec1(0) = 4; vec2(0) = 0;
+ vec1(1) = 8; vec2(1) = 1;
+ vec1(2) = 15; vec2(2) = 2;
+ vec1(3) = 16; vec2(3) = 3;
+ vec1(4) = 23; vec2(4) = 4;
+ vec1(5) = 42; vec2(5) = 5;
+
+ VERIFY_IS_EQUAL(vec1.rank(), 1);
+ VERIFY_IS_EQUAL(vec1.size(), 6);
+ VERIFY_IS_EQUAL(vec1.dimension(0), 6);
+
+ VERIFY_IS_EQUAL(vec3(0), 4);
+ VERIFY_IS_EQUAL(vec3(1), 8);
+ VERIFY_IS_EQUAL(vec3(2), 15);
+ VERIFY_IS_EQUAL(vec3(3), 16);
+ VERIFY_IS_EQUAL(vec3(4), 23);
+ VERIFY_IS_EQUAL(vec3(5), 42);
+
+ VERIFY_IS_EQUAL(vec4(0), 0);
+ VERIFY_IS_EQUAL(vec4(1), 1);
+ VERIFY_IS_EQUAL(vec4(2), 2);
+ VERIFY_IS_EQUAL(vec4(3), 3);
+ VERIFY_IS_EQUAL(vec4(4), 4);
+ VERIFY_IS_EQUAL(vec4(5), 5);
+}
+
+static void test_2d()
+{
+ Tensor<int, 2> mat1(2,3);
+ Tensor<int, 2, RowMajor> mat2(2,3);
+
+ mat1(0,0) = 0;
+ mat1(0,1) = 1;
+ mat1(0,2) = 2;
+ mat1(1,0) = 3;
+ mat1(1,1) = 4;
+ mat1(1,2) = 5;
+
+ mat2(0,0) = 0;
+ mat2(0,1) = 1;
+ mat2(0,2) = 2;
+ mat2(1,0) = 3;
+ mat2(1,1) = 4;
+ mat2(1,2) = 5;
+
+ TensorMap<Tensor<const int, 2> > mat3(mat1.data(), 2, 3);
+ TensorMap<Tensor<const int, 2, RowMajor> > mat4(mat2.data(), 2, 3);
+
+ VERIFY_IS_EQUAL(mat3.rank(), 2);
+ VERIFY_IS_EQUAL(mat3.size(), 6);
+ VERIFY_IS_EQUAL(mat3.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat3.dimension(1), 3);
+
+ VERIFY_IS_EQUAL(mat4.rank(), 2);
+ VERIFY_IS_EQUAL(mat4.size(), 6);
+ VERIFY_IS_EQUAL(mat4.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat4.dimension(1), 3);
+
+ VERIFY_IS_EQUAL(mat3(0,0), 0);
+ VERIFY_IS_EQUAL(mat3(0,1), 1);
+ VERIFY_IS_EQUAL(mat3(0,2), 2);
+ VERIFY_IS_EQUAL(mat3(1,0), 3);
+ VERIFY_IS_EQUAL(mat3(1,1), 4);
+ VERIFY_IS_EQUAL(mat3(1,2), 5);
+
+ VERIFY_IS_EQUAL(mat4(0,0), 0);
+ VERIFY_IS_EQUAL(mat4(0,1), 1);
+ VERIFY_IS_EQUAL(mat4(0,2), 2);
+ VERIFY_IS_EQUAL(mat4(1,0), 3);
+ VERIFY_IS_EQUAL(mat4(1,1), 4);
+ VERIFY_IS_EQUAL(mat4(1,2), 5);
+}
+
+static void test_3d()
+{
+ Tensor<int, 3> mat1(2,3,7);
+ Tensor<int, 3, RowMajor> mat2(2,3,7);
+
+ int val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ mat1(i,j,k) = val;
+ mat2(i,j,k) = val;
+ val++;
+ }
+ }
+ }
+
+ TensorMap<Tensor<const int, 3> > mat3(mat1.data(), 2, 3, 7);
+ TensorMap<Tensor<const int, 3, RowMajor> > mat4(mat2.data(), 2, 3, 7);
+
+ VERIFY_IS_EQUAL(mat3.rank(), 3);
+ VERIFY_IS_EQUAL(mat3.size(), 2*3*7);
+ VERIFY_IS_EQUAL(mat3.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat3.dimension(1), 3);
+ VERIFY_IS_EQUAL(mat3.dimension(2), 7);
+
+ VERIFY_IS_EQUAL(mat4.rank(), 3);
+ VERIFY_IS_EQUAL(mat4.size(), 2*3*7);
+ VERIFY_IS_EQUAL(mat4.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat4.dimension(1), 3);
+ VERIFY_IS_EQUAL(mat4.dimension(2), 7);
+
+ val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ VERIFY_IS_EQUAL(mat3(i,j,k), val);
+ VERIFY_IS_EQUAL(mat4(i,j,k), val);
+ val++;
+ }
+ }
+ }
+}
+
+
+static void test_from_tensor()
+{
+ Tensor<int, 3> mat1(2,3,7);
+ Tensor<int, 3, RowMajor> mat2(2,3,7);
+
+ int val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ mat1(i,j,k) = val;
+ mat2(i,j,k) = val;
+ val++;
+ }
+ }
+ }
+
+ TensorMap<Tensor<int, 3> > mat3(mat1);
+ TensorMap<Tensor<int, 3, RowMajor> > mat4(mat2);
+
+ VERIFY_IS_EQUAL(mat3.rank(), 3);
+ VERIFY_IS_EQUAL(mat3.size(), 2*3*7);
+ VERIFY_IS_EQUAL(mat3.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat3.dimension(1), 3);
+ VERIFY_IS_EQUAL(mat3.dimension(2), 7);
+
+ VERIFY_IS_EQUAL(mat4.rank(), 3);
+ VERIFY_IS_EQUAL(mat4.size(), 2*3*7);
+ VERIFY_IS_EQUAL(mat4.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat4.dimension(1), 3);
+ VERIFY_IS_EQUAL(mat4.dimension(2), 7);
+
+ val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ VERIFY_IS_EQUAL(mat3(i,j,k), val);
+ VERIFY_IS_EQUAL(mat4(i,j,k), val);
+ val++;
+ }
+ }
+ }
+
+ TensorFixedSize<int, Sizes<2,3,7> > mat5;
+
+ val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ array<ptrdiff_t, 3> coords;
+ coords[0] = i;
+ coords[1] = j;
+ coords[2] = k;
+ mat5(coords) = val;
+ val++;
+ }
+ }
+ }
+
+ TensorMap<TensorFixedSize<int, Sizes<2,3,7> > > mat6(mat5);
+
+ VERIFY_IS_EQUAL(mat6.rank(), 3);
+ VERIFY_IS_EQUAL(mat6.size(), 2*3*7);
+ VERIFY_IS_EQUAL(mat6.dimension(0), 2);
+ VERIFY_IS_EQUAL(mat6.dimension(1), 3);
+ VERIFY_IS_EQUAL(mat6.dimension(2), 7);
+
+ val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ VERIFY_IS_EQUAL(mat6(i,j,k), val);
+ val++;
+ }
+ }
+ }
+}
+
+
+static int f(const TensorMap<Tensor<int, 3> >& tensor) {
+ // Size<0> empty;
+ EIGEN_STATIC_ASSERT((internal::array_size<Sizes<> >::value == 0), YOU_MADE_A_PROGRAMMING_MISTAKE);
+ EIGEN_STATIC_ASSERT((internal::array_size<DSizes<int, 0> >::value == 0), YOU_MADE_A_PROGRAMMING_MISTAKE);
+ Tensor<int, 0> result = tensor.sum();
+ return result();
+}
+
+static void test_casting()
+{
+ Tensor<int, 3> tensor(2,3,7);
+
+ int val = 0;
+ for (int i = 0; i < 2; ++i) {
+ for (int j = 0; j < 3; ++j) {
+ for (int k = 0; k < 7; ++k) {
+ tensor(i,j,k) = val;
+ val++;
+ }
+ }
+ }
+
+ TensorMap<Tensor<int, 3> > map(tensor);
+ int sum1 = f(map);
+ int sum2 = f(tensor);
+
+ VERIFY_IS_EQUAL(sum1, sum2);
+ VERIFY_IS_EQUAL(sum1, 861);
+}
+
+void test_cxx11_tensor_map()
+{
+ CALL_SUBTEST(test_0d());
+ CALL_SUBTEST(test_1d());
+ CALL_SUBTEST(test_2d());
+ CALL_SUBTEST(test_3d());
+
+ CALL_SUBTEST(test_from_tensor());
+ CALL_SUBTEST(test_casting());
+}
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